Acceleration

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object over time.

Front

What is the formula for acceleration?

Back

a = (v_f - v_i) / t, where v_f is final velocity, v_i is initial velocity, and t is time.

Front

If a car's velocity changes from 20 m/s to 10 m/s in 5 seconds, what is its acceleration?

Back

a = (10 m/s - 20 m/s) / 5 s = -2 m/s².

Front

What does a negative acceleration indicate?

Back

Negative acceleration indicates that an object is slowing down.

Front

What is the unit of acceleration?

Back

The unit of acceleration is meters per second squared (m/s²).

Front

If a car is moving at a constant speed, what is its acceleration?

Back

The acceleration is 0 m/s².

Front

What is the relationship between acceleration and velocity?

Back

Acceleration is the change in velocity over time.

Front

How do you calculate the time taken to stop a vehicle given initial velocity and acceleration?

Back

t = (v_f - v_i) / a, where v_f is final velocity (0 for stopping), v_i is initial velocity, and a is acceleration.

Front

What is uniform acceleration?

Back

Uniform acceleration occurs when an object's acceleration is constant over time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).